<!DOCTYPE html>
<html>
<head>
    <title>用户注册</title>
</head>
<body>
    <form action="register.php" method="post">
        昵称：<input type="text" name="username" required><br>
        口令：<input type="password" name="password" required><br>
        邮箱：<input type="email" name="email" required><br>
        <input type="submit" value="注册">
    </form>
</body>
</html>